Sliding gate



(No Model.) 2 Sheets-Sheet 1.

E. FISCHER. SLIDING GATE.

No. 476,375. Patented June-v, 1892..

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I UNITED STATES PATENT @FFICE.

EMIL FISCHER, or IIALLsv'ILLE, ILLINOIS.

SLIDING GATE.

SPECIFICATION forming part of Letters Patent No. 476,375, dated June 7,1892. Application filed heptember 30, 1891. Serial No. 407,309. (Nomodel.)

To aZZ whom it may concern.-

Be it known that I, EMIL FISCHER, a citizen of the United States,residing at Hallsville, in the county of De Witt and State of Illinois,have invented certain new and useful Improvements in Sliding Gates; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to sliding and rolling gates, and has for itsobject to provide a simple and efficient mechanism for automaticallyopening and closing the gate after an initial momentum has been impartedthereto by a sudden pull on the operating-lever.

The improvement consists of the novel features and the peculiarconstruction and combination of the parts which will be hereinafter morefully described and claimed, and which are shown in the annexeddrawings, in which a Figure 1 is a perspective view of a gate embodyingmy invention. Fig. 2 is an elevation showing the operation of the sameby dotted lines. Fig. 3 is a cross-section showing the sheave-wheel infull lines. Fig. 4 isa detail view of the actuating-weight.

The posts A and B, located a proper distance apart and on one side ofthe roadway, support the gate 0 and the sheave D. The post E, located onthe opposite side of the road, forms a stop for the gate to closeagainst.

The gate 0 is of usual construction, its top rail F being extended andlocated between pairs of pulleys G on the said posts A and B, the lowerpulleys being grooved to receive the lower edge of the rail, which isconstructed to operate therein. The diagonal brace f, extending from thelower rail of the gate to the end of the extended rail F, strengthensthe latter and prevents sag therein. The sheavewheel D is mounted on thecross-bar a, which is connected at its end to the posts A and B,respectively, and is grooved to receive the cable or wire 11, which isconnected at its ends to the ends of the said rail F and which passesonce or twice around the said sheavewheel D between its ends. Thesheave-wheel is relatively proportioned to the size of the gate-that is,the circumference of the sheavewheel is somewhat greater than the widthof the gate-opening-so that on opening orclosing the gate the said wheelwill not make a complete revolution. This construction is essentialbecause the finishing movement of the said sheave-wheel is effected byan actuatingweight, which weight is limited in its movement by gravitywhen at its lowest position.

The actuating-weight I is semi-elliptical and is concentrically mountedwith the said sheave-wheel, being preferably supported on the same pivotwhich connects the said sheave wheel with the cross-bar a. The keeper Jstraddles the shank of the weight I and causes the weight and sheave toturn together. The proportion of the shank to the keeper is such thatthe weight has a limited movement independently of the said sheavewheel,thereby permitting the said weight to acquire a momentum after passingthe deadcenter before reacting on the gate through the said sheave-wheeland cable.

The operating-lever K for controlling the movements of the gate ispivotally supported on a post L, which is located on one side of theplane of the gate and is connected to the actuating-weight I by a cableor rod Z. This lever is composed of two parts M and N. The part N is ashort lever, which is pivotally su pported on the post L about midway ofits ends and is provided with a loop 72 and standards It, the loop andstandards being located on opposite sides of the pivotal support of thesaid lever. The part M, which is the operating-lever proper, is pivotedto the standards a, and has its short end projected through the loop 'nand provided with weight M, the latter serving, with the rod Z, tocounterbalance the lever K and relieve the sheave-wheel D of the weightof the said lever. The loop N permits alimited movement of the lever Mindependently of the lever N, thereby facilitating the operation of theactuating-weight.

It will be observed that the actuatingweight I normallyoccupiesa pendentposition whether the gate be opened or closed.

To open or close the gate, a smart pull on the outer end of the lever Mis all that is necessary. This operation brings the weight I to thehighest position, and the momentum acquired thereby being suliicient tocarry the weight past its dead-center the weight by the force of gravitywill descend and effect the complete opening and closing of the gate inthe aforesaid manner, as will be readily understood.

In either of the two positions of the weight I the latter will exert apressure on the lowermost portion of the keeper J, and a space will beleft between the uppermost portion of the said keeper and the upper edgeof the shank of the weight 1. Obviously on operating lever K the WeightI will receive an initial movement before performing efficient servicein carrying the weight of the gate. Again, the lost motion between theloop wand the part M of the lever K permits the said part M to acquirean initial movement before transmitting motion to the weight I.

n and between the wheel D and the weight I at J permits theoperating-lever K to obtain a movement prior to carrying the load. \Vhenthe weight I reaches its dead-point, the

acquired momentum of the gate will carry it past the same, and the saidweight gravitating will carry the gate to the end ofits travel. 1

will help to carry the said weight I past its dead-point. Either or bothof these causes will serve to carry the weight past its deadpoint,thereby materially assisting in the manipulation of the gate.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. The combination, with a sliding gateand supports therefor, of asheave-wheel having a circumference somewhat greater than the width ofthe gateopening, a cable connected at its ends to the ends of the gate,respectively, and passing around the said sheavewheel between its ends,and a weight attached to the same suflicient to move the gate to the endof its travel after an initial momentum The lost motion between theparts M and N at.

has been imparted thereto, substantially in the manner set forth.

2. The combination, with a sliding gate and supports therefor, of asheave-wheel having a circumference somewhat greater than the width ofthe gate-opening, a cable passing around the said sheave-wheel andhaving connections at its ends with the ends of the gate, and anactuating-weight attached to the same sufficient to move the gate andhavinga limited independent movement, substantially as set forth, forthe purpose specified.

3. The combination, with a gate and a weighted sheave-wheel having acircumference somewhat greater than the width of the gate-opening andheavy enough to operate the gate automatically after an initial momentumhas been imparted thereto, of a short lever, as N, pivotally supportedbetween'its ends and having the loop 7?. and the standards 97., and thelever M, pivoted to standard 01., and having its short end projectedthrough the loop at and weighted, substantially as described, for thepurpose specified.

4. The combination of the sliding gate, supports therefor, asheave-wheel having a circumference somewhat greater than the width ofthe gate-opening, a cable passing around the said sheave-wheel andconnected at its ends with the ends of the gate, a weight concentricallymounted with the said sheavewheel and constructed to actuate thesamehgff' and having alimited independent movement, the short lever N,pivotally supported between its ends, the connection I between the saidweight, lever N, the loop n, and the standard 17., secured to the leverN, and the lever M, pivoted to the standard at and having its short endprojected through the said loop and weighted, substantially as setforth.

In testimony whereof I affix my signature in presence of two witnesses.

EMIL FISCHER. Witnesses:

JAMES M. BARNETT, MAXWELL HAMILTON.

